/Engine/Source/Runtime/ApplicationCore/Public/GenericPlatform/GenericPlatformApplicationMisc.h
Searches for a window that matches the window name or the title starts with a particular text. When found, it returns the title text for that window
whether the window was found and the text copied or not
static bool GetWindowTitleMatchingText ( const TCHAR * TitleStartsWith, [FString](API\Runtime\Core\Containers\FString) & OutTitle )